linux-kernel - Re: [PATCH v4] arm64: defconfig: Enable STM protocol and source configs

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Message-ID: <0c5d174f-7cff-46a8-bbbd-b116e12cb09c@linaro.org>
Date: Mon, 21 Oct 2024 17:17:40 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Mao Jinlong <quic_jinlmao@...cinc.com>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Bjorn Andersson <quic_bjorande@...cinc.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Neil Armstrong <neil.armstrong@...aro.org>, Arnd Bergmann <arnd@...db.de>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] arm64: defconfig: Enable STM protocol and source
 configs

On 21/10/2024 11:03, Mao Jinlong wrote:
> COERSIGHT_STM config is enabled. Refer to Documentation/trace/stm.rst,
> to make software trace sources go through STM(System Trace Module),
> need to enable STP (System Trace Protocol) protocols and stm sources
> configs. With COERSIGHT_STM config, protocol configs and stm source
> configs, STM function will be fully functional.

I still do not understand why we want it. Which boards, which SoCs use
it or will benefit from it?

Best regards,
Krzysztof